WO2022003802A1

WO2022003802A1 - Non-combustion type suction device

Info

Publication number: WO2022003802A1
Application number: PCT/JP2020/025599
Authority: WO
Inventors: 学山田; 明弘杉山; 豊改發; 啓介森田; 渓介春木; 悠光西田; 裕和渡邉; 貴征青山; 元雄中野
Original assignee: 日本たばこ産業株式会社
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2022-01-06
Also published as: EP4173501A1; JP7357792B2; US11206870B1; US20210401046A1; JPWO2022003802A1

Abstract

Provided is a non-combustion type suction device including a power supply part, a housing part capable of accommodating an aerosol source, a heating part (104) for atomizing the aerosol source, and a suction port part in which a suction port for sucking an aerosol atomized from the aerosol source is provided. The heating part includes a porous ceramic substrate (140), a resistor pattern (142) provided on one face (140b) of the porous ceramic substrate, and a pair of electrode patterns (141) connected to the resistor pattern. The porosity bending coefficient ratio of the porous ceramic substrate is 21 or higher. In the one face of the porous ceramic substrate, a glass layer (143) is provided on a part of the face including at least the resistor pattern, and the resistor pattern is provided on the glass layer.

Description

Non-combustion aspirator

The present invention relates to a non-combustion type aspirator.

Conventionally, a non-combustion type suction device (hereinafter, may be simply referred to as a suction device) that tastes a flavor by sucking an aerosol atomized by heating has been known. This type of aspirator includes, for example, a cartridge containing atomizable contents (eg, an aerosol source) and a power supply unit equipped with a storage battery.

In the suction device, the heating part generates heat due to the electric power supplied from the storage battery. As a result, the contents in the cartridge are atomized. The user can aspirate the atomized aerosol with the air through the mouthpiece. For example, Patent Document 1 describes an aerosol generator that generates an aerosol.

Here, it is known that the heating unit is provided with a resistor pattern and a pair of electrode patterns connected to the resistor pattern on one surface of the porous ceramic substrate. As a heating unit, for example, it has been proposed to embed a resistance heating element and a lead wire inside an insulating ceramic substrate and improve the durability performance by optimizing the material and film thickness of the resistance heating element and the lead wire. (See Patent Document 2). However, in a heater using a dense ceramic substrate, it is difficult to continuously supply the aerosol source when the purpose is to atomize the aerosol source, and good atomization efficiency cannot be obtained.

Japan Special Table 2004-524703 Gazette Japanese Patent Application Laid-Open No. 2000-340349 Japanese Patent No. 5685152

On the other hand, in order to obtain good atomization efficiency, a porous body is used as a substrate or a heating element, and an aerosol source is directly and continuously supplied to the heating part by a capillary phenomenon, and the aerosol is impregnated into the porous body. Proposed ones that quickly atomize the source. For example, it is the porous heating element described in Patent Document 3. According to this porous heating element, the porous body itself is an electric resistance heating element that generates heat, and is composed of a porous body using aluminum as a main raw material.

However, according to the above-mentioned porous heating element, the porous body itself must be a conductive substance, and particularly when used for the purpose of atomizing a liquid, chemical resistance and mechanical strength against the liquid depending on the application. There was a problem that it was difficult to achieve both.

It is also conceivable to form a heating element on one surface of an insulating porous body such as ceramics, but in this case, multiple types of ceramic materials can be used for the porous body, and the material selectivity of the substrate is high. However, since the electric resistance heating element formed on the uneven surface of the porous body is not uniform in thickness and locally differs, there is a problem that the thermal impact resistance is low and the adhesive strength between the substrate and the electric resistance heating element is also low. there were.

The present invention has been made in view of the above circumstances, and provides a non-combustion type suction device provided with a heating unit capable of obtaining high atomization efficiency and durability when used for the purpose of atomizing a liquid. The purpose is.

(1) In order to achieve the above object, the non-combustible aspirator according to one aspect of the present invention includes a power supply unit, an accommodating unit capable of accommodating an aerosol source, and a heating unit for atomizing the aerosol source. The aerosol source includes a suction port formed with a suction port for sucking atomized aerosol, and the heating portion includes a porous ceramic substrate and a resistor provided on one surface of the porous ceramic substrate. A body pattern and a pair of electrode patterns connected to the resistor pattern and provided on the one surface of the porous ceramic substrate are provided, and the heating unit has a current flowing between the pair of electrode patterns. By being supplied, the resistor pattern generates heat, the porosity bending degree coefficient ratio of the porous ceramic substrate is 21 or more, and at least the resistor pattern is formed on one of the surfaces of the porous ceramic substrate. A glass layer is provided on a part of the surface including the glass layer, the resistor pattern is provided on the glass layer, and the aerosol source penetrated into the porous ceramic substrate is heated by the resistor pattern and the aerosol is generated. Is released as.

(2) In the non-combustion type suction device according to the aspect (1) above, the porosity bending degree coefficient ratio of the porous ceramic substrate may be 26 or more.

(3) In the non-combustion type suction device according to the above aspect (1) or (2), the average porosity of the porous ceramic substrate may be 40 to 71% by volume.

(4) In the non-combustion type suction device according to any one of the above (1) to (3), the bending degree coefficient of the pores of the porous ceramic substrate may be 2.0 or less.

(5) In the non-combustion type suction device according to any one of the above (1) to (4), the porous ceramic substrate may have an average pore diameter of 0.15 to 72 μm.

(6) In the non-combustion type suction device according to any one of the above (1) to (5), the glass layer may have a thickness of 3 to 90 μm.

(7) In the non-combustion type suction device according to any one of the above (1) to (6), the glass layer is a thick film glass paste provided on one surface of the porous ceramic substrate. It is composed of a sintered body, the resistor pattern is composed of a sintered body of a thick film resistor paste provided on the glass layer, and the electrode pattern is a thickness provided on the glass layer. It may be composed of a sintered body of a film conductive paste.

(8) In the non-combustion type suction device according to the aspect (7) above, the porous ceramic substrate contains any one of alumina, zirconia, mulite, silica, titania, silicon nitride, silicon carbide, and carbon as a main component. The resistor pattern is a thick film sintered body containing a metal powder of any one of silver, palladium and ruthenium oxide and glass, and the electrode pattern is made of copper, nickel, aluminum, silver, platinum and gold. It is a thick film sintered body containing any one of the metal powders and glass, and the glass layer may be a thick film sintered body containing any one of Ba, B, and Zn.

(9) In the non-combustion type suction device according to any one of the above (1) to (8), one surface of the porous ceramic substrate is a long surface, and the pair of electrode patterns is , One end of the pair of U-shaped arcs may be connected to each other and the other end may be connected to each of the pair of electrode patterns. ..

(10) In the non-combustion type suction device according to any one of the above (1) to (9), the mouthpiece may be provided with a flavor source container.

(11) In the non-combustion type aspirator according to the above aspect (10), the flavor source container may contain a tobacco component.

According to the non-combustion type suction device of the present invention, the porosity bending degree coefficient ratio of the porous ceramic substrate is 21 or more, and one surface of the porous ceramic substrate has at least the said one of the surfaces. Since the resistor pattern is provided via the glass layer formed in a part of the region including the resistor pattern, the thermal impact resistance and the adhesive strength of the electric resistance heating element can be obtained, and high durability performance can be obtained. Further, since the aerosol source penetrated into the porous ceramic substrate is atomized by heating by the resistor pattern, high atomization efficiency can be obtained.

Here, preferably, the porosity bending degree coefficient ratio of the porous ceramic substrate is 26 or more. As a result, the heated portion is provided with pores having a high porosity and small bending, so that high atomization performance can be obtained. If the porosity flexion coefficient ratio is less than 26, the porosity may be too low or the pores may be bent too much, resulting in insufficient penetration of the aerosol source, making it difficult to obtain sufficient atomization performance. Become.

Also, preferably, the porous ceramic substrate has an average porosity of 40 to 71% by volume. This facilitates the penetration of the aerosol source into the porous ceramic substrate, so that the atomization efficiency of the aerosol source, that is, the atomization performance is improved. When the porosity exceeds 71% by volume, it becomes difficult to sufficiently obtain the durability of the heated portion due to the peeling of the glass layer, the resistor pattern, or the electrode pattern. If the porosity is less than 40% by volume, it becomes difficult to obtain sufficient atomization performance.

Further, preferably, the bending degree coefficient of the pores of the porous ceramic substrate is 2.0 or less. As a result, since the heating portion is provided with pores having small bending, high atomization performance can be obtained. If the bending coefficient exceeds 2.0, the penetration resistance of the aerosol source may increase and the penetration of the aerosol source may be insufficient, making it difficult to obtain sufficient atomization performance.

Also, preferably, the porous ceramic substrate has an average pore diameter of 0.15 to 72 μm. As a result, the aerosol source can be easily infiltrated into the porous ceramic substrate by the capillary action, so that the atomization efficiency of the aerosol source, that is, the atomization performance is improved. When the average pore diameter is less than 0.15 μm, the penetration resistance of the aerosol source increases and the penetration of the aerosol source becomes insufficient, and when the average pore diameter exceeds 72 μm, the capillary force due to the capillary phenomenon decreases and the aerosol source Infiltration may be insufficient, making it difficult to obtain sufficient atomization performance.

Further, preferably, the glass layer has a thickness of 3 to 90 μm. When the thickness of the glass layer is less than 3 μm, the resistance value of the resistor pattern varies and the manufacturing yield decreases, and when it exceeds 90 μm, the heat conduction from the resistor pattern to the porous ceramic substrate decreases and atomization occurs. It becomes difficult to obtain sufficient performance.

Further, preferably, the glass layer is composed of a sintered body of a thick film glass paste provided on one surface of the porous ceramic substrate, and the resistor pattern is provided on the glass layer. It is composed of a sintered body of the thick film resistor paste obtained, and the electrode pattern is composed of a sintered body of the thick film conductive paste provided on the glass layer. As a result, since the glass layer and the resistor pattern and the electrode pattern on the glass layer are formed by the thick film on one surface of the porous ceramic substrate, thermal shock resistance and adhesive strength can be obtained. At the same time, durability is obtained.

Further, preferably, the porous ceramic substrate contains any one of alumina, zirconia, mullite, silica, titania, silicon nitride, silicon carbide, and carbon as a main component, and the resistor pattern is silver. It is a thick film sintered body containing metal powder of any one of palladium and ruthenium oxide and glass, and the electrode pattern is made of metal powder of any one of copper, nickel, aluminum, silver, platinum and gold. It is a thick film sintered body containing glass, and the glass layer is a thick film sintered body containing any one of Ba, B, and Zn. As described above, since the glass layer and the resistor pattern and the electrode pattern on the glass layer are formed by the thick film sintered body on one surface of the porous ceramic substrate, the heat impact resistance and adhesion are formed. Strength is obtained and durability is obtained.

Further, preferably, one surface of the porous ceramic substrate is a surface having a longitudinal shape, the pair of electrode patterns are arranged at both ends of the surface having the longitudinal shape, and the resistor patterns are paired. One end of the U-shaped portion is connected to each other and the other end is connected to each of the pair of electrode patterns. As described above, the resistor pattern has a shape in which one end of the pair of U-shaped portions is connected to each other and the tip extending from the other end is connected to each of the pair of electrode patterns. Since the heat is not concentrated on the entire resistor pattern and the entire resistor pattern generates heat uniformly, the atomization efficiency of the aerosol source, that is, the atomization performance is improved.

Further, preferably, the mouthpiece is provided with a flavor source container. By arranging the flavor source in the mouthpiece portion in this way, the flavor can be added to the aerosol.

Further, preferably, the flavor source container contains a tobacco component. In this way, the tobacco flavor can be added to the aerosol by including the tobacco component in the flavor source.

It is a perspective view of the aspirator which concerns on embodiment. It is an exploded perspective view of the aspirator which concerns on embodiment. It is a perspective view of the power supply unit which concerns on embodiment. It is a top view which looked at the power supply unit which concerns on embodiment from the holding unit side in the axial direction. It is an exploded perspective view of the holding unit which concerns on embodiment. It is a perspective view which shows the connection structure of the 1st connection member and the 2nd connection member which concerns on embodiment. It is a top view which looked at the holding unit and the cartridge which concerns on embodiment from the power supply unit side in the axial direction. It is an exploded perspective view of the mouthpiece corresponding to the line VIII-VIII of FIG. It is sectional drawing which follows the axial direction of the cartridge which concerns on embodiment. It is an exploded perspective view of the cartridge which concerns on embodiment. It is a perspective view which looked at the tank which concerns on embodiment from the opening side. It is a perspective view of the gasket which concerns on embodiment. It is a top view of the heating part which concerns on embodiment. It is a perspective view of the heater holder which concerns on embodiment. It is a perspective view of the cap which concerns on embodiment. It is a process diagram explaining the main part of the manufacturing process of the heating part of FIG. The present invention relates to a test product in which any one of the pore ratio, the average pore diameter, the thickness of the glass layer, the area of the resistor pattern, the thickness of the resistor pattern, the resistance value of the resistor pattern, and the area of the electrode pattern is changed. It is a chart which shows the content and the experimental result of the test product used for the atomization experiment performed by the person, etc. It is a figure which shows the content and the experimental result of the test product used in the atomization experiment performed by the present inventors, etc. for the test product in which the width of the glass layer and the width with respect to the resistor pattern are matched. It is a graph which shows the relationship between the porosity and the atomization amount, which was derived from the data shown in FIG. It is a graph which shows the relationship between the bending degree coefficient and the atomization amount, which was derived from the data shown in FIG. It is a graph which shows the relationship between the porosity bending degree coefficient ratio and the atomization amount, which was derived from the data shown in FIG.

Next, an embodiment of the present invention will be described with reference to the drawings.
[Aspirator]
FIG. 1 is a perspective view of the aspirator.
The suction device 1 shown in FIG. 1 is a so-called non-combustion type suction device, in which a user tastes the flavor of tobacco by sucking an aerosol atomized by heating through a cigarette (tobacco capsule).

The suction device 1 includes a main body unit 10, a cartridge 11 detachably attached to the main body unit 10, and a cigarette capsule 12.

<Main unit>
FIG. 2 is an exploded perspective view of the suction device 1.
As shown in FIG. 2, the main body unit 10 includes a power supply unit 21, a holding unit 22, and a mouthpiece 23. The power supply unit 21, the holding unit 22, and the mouthpiece 23 are each formed in a cylindrical shape with the axis O as the central axis, and are arranged side by side on the axis O. The power supply unit 21 and the holding unit 22 and the holding unit 22 and the mouthpiece 23 are detachably connected to each other.

In the following explanation, the direction along the axis O is called the axial direction. In this case, in the axial direction, the side from the mouthpiece 23 toward the power supply unit 21 is referred to as the anti-suction side, and the side from the power supply unit 21 toward the mouthpiece 23 is referred to as the mouthpiece side. Further, the direction that intersects the axis O in a plan view from the axial direction is referred to as a radial direction, and the direction that orbits around the axis O may be referred to as a circumferential direction. In the present specification, "direction" means two directions, and when indicating one direction of "direction", it is described as "side".

<Power supply unit>
FIG. 3 is a perspective view of the power supply unit 21.
As shown in FIGS. 2 and 3, the power supply unit 21 includes a cylindrical housing 31, a storage battery unit (not shown) housed in the housing 31, and a pin electrode 33.

<Housing>
As shown in FIGS. 2 and 3, the housing 31 has an outer cylinder portion 35, an interposing member 36, and a connecting mechanism 37.
The outer cylinder portion 35 is formed in a cylindrical shape with the axis O as the central axis. The interposing member 36 is formed in a cylindrical shape with the axis O as the central axis. The interposing member 36 is fitted to the outer cylinder portion 35 from the holding unit 22 side in the axial direction.

A button exposed hole 38 is formed in the vicinity of the end portion on the holding unit 22 side in the axial direction of the outer cylinder portion 35. The button exposed hole 38 penetrates the outer cylinder portion 35 in the radial direction. The button 39 is housed in the button exposed hole 38. The button 39 is configured to be movable in the radial direction. The button 39 presses and operates a switch element (not shown) of the storage battery unit as it moves inward in the radial direction. By pressing the button 39 to turn on the power, the resistance pattern 142 of the heating unit 104 rises in temperature, and as a result, the aerosol source is atomized to generate an aerosol (the configuration of the heating unit 104 will be described later). .). The surface of the button 39 is exposed on the outer peripheral surface of the outer cylinder portion 35 through the button exposure hole 38. The button 39 is not limited to the one that moves in the radial direction, and may be, for example, one that slides in the axial direction. Further, the suction device 1 may be operated by a touch sensor or the like instead of the button 39.

<Connection mechanism>
FIG. 4 is a plan view of the power supply unit 21 as viewed from the holding unit 22 side in the axial direction.
As shown in FIGS. 2 to 4, the connection mechanism 37 includes a connection cap 40, a first connecting member 41, and an annular piece 42.
The connection cap 40 is made of an elastic resin material such as silicone resin. The connection cap 40 includes a base portion 45, a flange portion (not shown) protruding outward in the radial direction at an end portion of the base portion 45 opposite to the holding unit 22 in the axial direction, and a surrounding convex portion 46. ,have.

As shown in FIG. 4, the base portion 45 is formed in a columnar shape with the axis O as the central axis. The base portion 45 is formed with an electrode insertion hole 47 through which the pin electrode 33 is inserted. The electrode insertion hole 47 penetrates the base portion 45 in the axial direction and communicates with the inside of the housing 31. The pin electrode 33 projects from the base portion 45 toward the holding unit 22 in the axial direction through the electrode insertion hole 47.

The surrounding convex portion 46 projects axially from the end surface of the base portion 45 facing the holding unit 22 side in the axial direction. Specifically, the surrounding convex portion 46 is formed in a substantially annular shape extending along the outer peripheral edge of the base portion 45. That is, the surrounding convex portion 46 surrounds the pin electrode 33 at a position separated radially outward from the pin electrode 33. Further, in the surrounding convex portion 46, a notch portion 46a is formed in the middle of the annular shape. Three notches 46a are evenly formed at intervals of 120 ° in the circumferential direction. The notch 46a functions as an air flow path. The surrounding convex portion 46 may be located radially inside the outer peripheral edge of the base portion 45 as long as it surrounds the periphery of the pin electrode 33. Further, the surrounding convex portion 46 is not limited to an annular shape, but may have a polygonal shape or the like. Further, the number and positions of the cutout portions 46a can be appropriately changed. Further, in the present embodiment, the “enclosure” is not limited to those that are intermittently extended, but also include those that are continuously extended. However, when the surrounding convex portion 46 is formed in a continuous annular shape, it is necessary to separately form an air flow path. The surrounding convex portion 46 in the present embodiment can be appropriately changed as long as it has a configuration that surrounds the periphery of the pin electrode 33 as a whole.

The surrounding convex portion 46 is formed in a triangular shape that sharpens toward the holding unit 22 side in the axial direction in a vertical cross-sectional view along the axial direction. The protruding height of the surrounding convex portion 46 from the base portion 45 is lower than that of the pin electrode 33. However, the protruding height of the surrounding convex portion 46 may be higher than that of the pin electrode 33. Further, the vertical cross-sectional view shape of the surrounding convex portion 46 is not limited to the triangular shape.

The first connecting member 41 includes a base cylinder portion (not shown) disposed in the housing 31, a vertically engaging convex portion (first vertical engaging convex portion 51a to a third vertical engaging convex portion 51c), and a vertical engaging convex portion 51c. A laterally engaged convex portion 52 is provided.

The end of the holding unit 22 side in the axial direction of the base cylinder portion surrounds the circumference of the connection cap 40. An outer flange portion 55 projecting outward in the radial direction is formed at the end portion of the base cylinder portion on the holding unit 22 side in the axial direction.

As shown in FIGS. 3 and 4, the vertically engaged convex portions 51a to 51c project from the outer flange portion 55 toward the holding unit 22 side (suction port side) in the axial direction. A plurality of the vertically engaged convex portions 51a to 51c are formed at intervals in the circumferential direction. In the present embodiment, three vertically engaged convex portions 51a to 51c are evenly arranged at intervals of 120 ° in the circumferential direction. The vertically engaged convex portions 51a to 51c may be singular or plural. Further, the pitches of the vertically engaged convex portions 51a to 51c can be appropriately changed. In this case, the plurality of vertically engaged convex portions 51a to 51c may be unevenly arranged.

As shown in FIG. 4, in each of the above-mentioned vertically engaged convex portions 51a to 51c, the above-mentioned pin electrodes 33 are not arranged on the virtual straight lines La to Lc connecting the center in the circumferential direction and the axis O. Vertically engaged convex portions 51a to 51c are arranged. Specifically, the pin electrode 33 is arranged at a position that is line-symmetric with respect to the virtual straight line La connecting the first vertical engaging convex portion 51a and the axis O. That is, the virtual straight line T1 connecting the pin electrodes 33 and the virtual straight line La are orthogonal to each other, and the distances from the virtual straight line La to the pin electrodes 33 are equal to each other.

As shown in FIG. 3, the tip of the vertically engaged convex portions 51a to 51c located on the holding unit 22 side in the axial direction is located closer to the holding unit 22 in the axial direction than the tip of the pin electrode 33. The vertically engaged convex portions 51a to 51c are formed in a rectangular shape when viewed from the side in the radial direction. At the end of the vertically engaging convex portions 51a to 51c on the holding unit 22 side, the surface facing inward in the radial direction is inclined so that the thickness in the radial direction gradually decreases toward the holding unit 22 side in the axial direction. It is said to be a face. This inclined surface functions as a guide for smoothly guiding the vertically engaged convex portions 51a to 51c to the engaging concave portion 180 described later of the cartridge 11.

As shown in FIGS. 3 and 4, the laterally engaged convex portion 52 protrudes outward in the radial direction from the outer flange portion 55. The laterally engaged convex portion 52 is formed in a rectangular shape in a plan view seen from the axial direction. A plurality of laterally engaged convex portions 52 are formed at intervals in the circumferential direction. In the present embodiment, four laterally engaged convex portions 52 are evenly arranged at intervals of 90 ° in the circumferential direction. In the present embodiment, one laterally engaged convex portion 52 is arranged at a position equivalent to that of the first vertically engaged convex portion 51a in the circumferential direction. The laterally engaged convex portions 52 may be singular or plural. Further, the pitch of the laterally engaged convex portion 52 can be appropriately changed. In this case, the plurality of laterally engaged convex portions 52 may be unevenly arranged.

The annular piece 42 is formed in a thin ring. The above-mentioned base cylinder portion is inserted into the annular piece 42 from the holding unit 22 side in the axial direction. As shown in FIG. 3, a bending portion 56 is formed in a part of the annular piece 42 in the circumferential direction. The bent portion 56 is formed in an arch shape that bulges outward in the radial direction. The flexible portion 56 is configured to be elastically deformable in the radial direction. The bending portion 56 is located inside the laterally engaging convex portion 52 with respect to the outer end surface in the radial direction.

A plurality of the above-mentioned bending portions 56 are formed at intervals in the circumferential direction. For example, the flexible portion 56 is arranged at the same position in the circumferential direction as the pair of laterally engaging convex portions 52 facing each other in the radial direction (left-right direction) among the laterally engaging convex portions 52. However, the number of bending portions 56 can be changed as appropriate. For example, the flexible portion 56 may be formed corresponding to each laterally engaging convex portion 52, or may be formed corresponding to only one laterally engaging convex portion 52.

<Holding unit>
FIG. 5 is an exploded perspective view of the holding unit 22.
As shown in FIG. 5, the holding unit 22 is detachably attached to the power supply unit 21 and the mouthpiece 23, respectively. Specifically, the holding unit 22 includes a container holding cylinder 60, a transmission cylinder 61, a second connecting member 62, and a sleeve 63.

The container holding cylinder 60 is formed in a cylindrical shape with the axis O as the central axis. An observation hole 65 is formed in the central portion of the container holding cylinder 60 in the axial direction. The observation hole 65 penetrates the container holding cylinder 60 in the radial direction. The observation hole 65 is formed in an oval shape with the axial direction as the longitudinal direction. The observation holes 65 are formed in pairs in the portions of the container holding cylinder 60 that face each other in the radial direction. The number, position, shape, etc. of the observation holes 65 can be changed as appropriate.

A vent 66 is formed in a portion of the container holding cylinder 60 located on the power supply unit 21 side (anti-suction side) in the axial direction from the observation hole 65. The vent 66 penetrates the container holding cylinder 60 in the radial direction. The vent 66 communicates the inside and outside of the holding unit 22. The vents 66 are formed in pairs in the container holding cylinders 60, which face each other in the radial direction (front and back directions). The number, position, shape, etc. of the vents 66 can be changed as appropriate.

The transmission cylinder 61 is made of a material having light transmission. The transmission cylinder 61 is inserted in the container holding cylinder 60. Specifically, the transmission cylinder 61 is on the mouthpiece 23 side (suction port side) in the axial direction with respect to the vent 66 in the container holding cylinder 60, and covers the observation hole 65 from the inside in the radial direction. That is, the user can visually recognize the inside of the holding unit 22 through the observation hole 65 and the transmission cylinder 61. The holding unit 22 may be configured not to have an observation hole 65 or a transmission cylinder 61.

The second connecting member 62 is locked to the above-mentioned first connecting member 41 when the holding unit 22 is connected to the power supply unit 21. Specifically, the second connecting member 62 includes a fitting cylinder 70, a guide cylinder 71, and a locking piece 72.

The fitting cylinder 70 is formed in a cylindrical shape with the axis O as the central axis. The fitting cylinder 70 is fitted to a portion of the container holding cylinder 60 located on the power supply unit 21 side in the axial direction with respect to the transmission cylinder 61 by press fitting or the like.

The guide cylinder 71 is arranged coaxially with the fitting cylinder 70. The guide cylinder 71 extends from the fitting cylinder 70 to the mouthpiece 23 side in the axial direction. The guide cylinder 71 is formed in a tapered cylinder shape whose inner diameter gradually increases toward the mouthpiece 23 side in the axial direction. The outer diameter of the guide cylinder 71 is smaller than the outer diameter of the fitting cylinder 70. A relief portion 74 is formed at a position of the guide cylinder 71 that overlaps with the above-mentioned ventilation port 66 when viewed from the side in the radial direction. The relief portion 74 is formed in a U shape that opens, for example, on the side of the mouthpiece 23 in the axial direction. The vent 66 opens into the holding unit 22 through the relief portion 74. The shape of the relief portion 74 may be such that at least a part of the vent 66 is exposed in the holding unit 22. Further, when the guide cylinder 71 and the vent 66 are arranged at different positions in the axial direction, the guide cylinder 71 may be configured not to have a relief portion 74.

FIG. 6 is a perspective view showing a connection structure of the first connecting member 41 and the second connecting member 62.
As shown in FIGS. 5 and 6, the locking piece 72 projects from the fitting cylinder 70 toward the power supply unit 21 in the axial direction. The locking piece 72 is formed in an L shape when viewed from the side in the radial direction. Specifically, the locking piece 72 has a vertically extending portion 80 and a horizontally extending portion 81. The vertically extending portion 80 projects from the fitting cylinder 70 toward the power supply unit 21 in the axial direction. The laterally extending portion 81 extends cantilevered from the end portion of the vertically extending portion 80 on the power supply unit 21 side in the axial direction toward one side in the circumferential direction.

FIG. 7 is a plan view of the holding unit 22 and the cartridge 11 as viewed from the power supply unit 21 side in the axial direction.
As shown in FIGS. 6 and 7, in the laterally extending portion 81, an engaging recess 85 that is recessed toward the outside in the radial direction is formed at one end in the circumferential direction. The engaging recess 85 is formed in a semicircular shape toward the outside in the radial direction.

A plurality of the above-mentioned locking pieces 72 are formed at intervals in the circumferential direction. In the present embodiment, the locking pieces 72 are evenly arranged at intervals of 90 ° in the circumferential direction. An engaging groove 83 into which the above-mentioned lateral engaging convex portion 52 is inserted is defined between the locking pieces 72 adjacent to each other in the circumferential direction. The engaging groove 83 is formed in an L shape in a side view.

As shown in FIG. 6, the power supply unit 21 and the holding unit 22 are detachable by connecting the locking piece 72 and the laterally engaging convex portion 52. That is, in order to connect the power supply unit 21 and the holding unit 22, after inserting the lateral engaging convex portion 52 into the engaging groove 83 in the axial direction, the power supply unit 21 and the holding unit 22 are relative to each other around the axis O. Rotate. Then, the laterally engaging convex portion 52 engages in the axial direction between the laterally extending portion 81 and the fitting cylinder 70. Further, in the process in which the power supply unit 21 and the holding unit 22 rotate relative to each other around the axis O, the bent portion 56 of the annular piece 42 is fitted into the engaging recess 85. As a result, the bent portion 56 engages with the engaging recess 85 in the circumferential direction. As a result, the power supply unit 21 and the holding unit 22 are assembled to each other in a state of being positioned in the axial direction and the circumferential direction.

In the engaging groove 83 of the present embodiment, the fitting cylinder 70 and the laterally extending portion 81 are formed in a tapered shape in which the width in the axial direction gradually narrows from the other side in the circumferential direction toward one side. ing. Specifically, the end surface of the laterally extending portion 81 facing the mouthpiece 23 side in the axial direction is an inclined surface extending toward the power supply unit 21 side in the axial direction from the other side in the circumferential direction toward one side. ..

The laterally engaged convex portion 52 is formed in a tapered shape in which the width in the axial direction gradually narrows from one side in the circumferential direction toward the other side. Specifically, the end face of the laterally engaged convex portion 52 facing away from the holding unit 22 in the axial direction is inclined to extend toward the mouthpiece 23 in the axial direction from one side in the circumferential direction to the other side. It is said to be a face. As a result, when the power supply unit 21 and the holding unit 22 are connected, the interference between the laterally extending portion 81 and the laterally engaging convex portion 52 can be suppressed, and the assembling property can be improved.

As shown in FIG. 5, the sleeve 63 is fitted to the portion of the container holding cylinder 60 located on the side of the mouthpiece 23 in the axial direction with respect to the transmission cylinder 61 by press fitting or the like. The transmission cylinder 61 described above is held in the axial direction between the second connecting member 62 and the sleeve 63. A female threaded portion 63a is formed on the inner peripheral surface of the sleeve 63.

<Mouthpiece>
FIG. 8 is an exploded perspective view of the mouthpiece 23 corresponding to the line VIII-VIII of FIG.
As shown in FIG. 8, the mouthpiece 23 includes a mouthpiece main body 90 and a non-slip member (first non-slip member 91 and second non-slip member 92).

The mouthpiece 23 is formed with a suction port 23a capable of accommodating the tobacco capsule 12. The mouthpiece body 90 is formed in a multi-stage cylinder shape with the axis O as the central axis. A male screw portion 90a is formed at the end portion of the mouthpiece body 90 on the holding unit 22 side in the axial direction. The male threaded portion 90a of the mouthpiece body 90 is detachably screwed to the female threaded portion 63a of the sleeve 63 described above. The mouthpiece body 90 may be attached to and detached from the sleeve 63 by a method other than screwing (for example, fitting).

The abutting flange 93 is formed in the mouthpiece main body 90 at a portion located on the side opposite to the holding unit 22 in the axial direction with respect to the male screw portion 90a. The abutting flange 93 is formed in an annular shape that projects outward in the radial direction. The abutting flange 93 is axially abutted against the holding unit 22 with the mouthpiece 23 mounted on the holding unit 22. The outer diameter of the abutting flange 93 gradually decreases as it is separated from the holding unit 22 in the axial direction.

At the end of the mouthpiece body 90 on the holding unit 22 side in the axial direction, a partition portion 94 that partitions the inside of the mouthpiece body 90 in the axial direction is formed. In the partition portion 94, a through hole 95 that penetrates the partition portion 94 in the axial direction is formed at a position that overlaps with the axis O. The through hole 95 has, for example, an oval shape having one of the radial directions as the longitudinal direction. The plan view shape of the through hole 95 may be a perfect circle shape, a polygonal shape, or the like.

The first non-slip member 91 is integrally formed of a resin material such as a silicone resin. The first non-slip member 91 includes a ring portion 96, a fitting protrusion 97, and a contact protrusion 98.

The ring portion 96 is fitted into the mouthpiece body 90 in the axial direction from the holding unit 22 side. The first non-slip member 91 is positioned in the axial direction with respect to the mouthpiece main body 90 by abutting the ring portion 96 against the partition portion 94 described above in the axial direction. A communication hole 96a is formed in the center of the ring portion 96. The communication hole 96a communicates the inside of the holding unit 22 with the inside of the mouthpiece main body 90 through the above-mentioned through hole 95.

The fitting protrusions 97 are formed in pairs at positions facing each other in the radial direction with the communication hole 96a sandwiched between the inner peripheral edges of the ring portion 96. The fitting protrusion 97 protrudes from the ring portion 96 in the axial direction on the side opposite to the holding unit 22. Each fitting protrusion 97 is fitted to both ends in the radial direction in the above-mentioned through hole 95. As a result, the first non-slip member 91 is positioned in the circumferential direction with respect to the mouthpiece main body 90. Although the present embodiment describes the configuration in which the fitting protrusion 97 is fitted in the through hole 95, the fitting protrusion 97 may be fitted in a hole different from the through hole 95. good.

The contact protrusion 98 protrudes from the ring portion 96 toward the holding unit 22 in the axial direction. The abutting protrusion 98 is formed in a circular shape centered on the axis O. In the present embodiment, the contact protrusions 98 are concentrically formed in two rows. The first non-slip member 91 may have a configuration that does not have the contact protrusion 98.

The second non-slip member 92 is integrally formed of a resin material such as a silicone resin. The second non-slip member 92 is fitted into the mouthpiece main body 90 from the side opposite to the holding unit 22 in the axial direction. The second non-slip member 92 is axially positioned with respect to the mouthpiece main body 90 by being abutted against the partition portion 94 described above in the axial direction.

<Tobacco capsule>
As shown in FIG. 2, the tobacco capsule 12 is detachably attached to the mouthpiece body 90 from the side opposite to the holding unit 22 in the axial direction. The tobacco capsule 12 includes a capsule unit 77 and a filter unit 78. The tobacco capsule 12 is configured as a flavor source container.

The capsule portion 77 is formed in a bottomed tubular shape with the axis O as the central axis. A mesh opening that penetrates the bottom wall portion in the axial direction is formed in the bottom wall portion (not shown) that closes the opening on the holding unit 22 side in the axial direction of the capsule portion 77.

The filter portion 78 is fitted into the capsule portion 77 from the side opposite to the holding unit 22 in the axial direction. For example, tobacco leaves are enclosed in the space defined by the capsule portion 77 and the filter portion 78. A flavor source other than tobacco leaves may be enclosed.

<Cartridge>
As shown in FIGS. 1 and 2, the cartridge 11 stores a liquid aerosol source and atomizes the liquid aerosol source. The cartridge 11 is housed in the transmission cylinder 61 of the holding unit 22.

FIG. 9 is a cross-sectional view taken along the axial direction (axis Q) of the cartridge 11. FIG. 10 is an exploded perspective view of the cartridge 11.
As shown in FIGS. 9 and 10, the cartridge 11 includes a bottomed cylindrical tank 101, a substantially cylindrical gasket 102 housed in the tank 101, a substantially plate-shaped mesh body 103, and a heating unit 104. The atomizing container 105, the heater holder 106 that closes the opening 110 of the tank 101, and the end cap 107 that is attached to the side opposite to the heater holder 106 in the tank 101 in the axial direction are provided.

FIG. 11 is a perspective view of the tank 101 as viewed from the opening 110 side.
As shown in FIGS. 9 to 11, ribs 112 are formed on the inner peripheral wall 111 of the tank 101. Four ribs 112 are formed at substantially equal intervals in the circumferential direction. The rib 112 is formed along the axis Q direction of the inner peripheral wall 111 of the tank 101. The rib 112 is provided between the bottom plate 113 provided near the end of the tank 101 on the mouthpiece 23 side and slightly in front of the end (tip) on the opening 110 side. The rib 112 is formed in a rectangular shape when viewed from the axis Q direction. The shape and number of ribs 112 may be changed as appropriate. The tank 101 is made of a light-transmitting material so that the remaining amount of the aerosol source contained therein can be visually recognized.

An aerosol flow path tube 114 is formed on the inner peripheral wall 111 of the tank 101 along the axis Q direction. The aerosol flow path tube 114 is formed from the end of the opening 110 to the bottom plate 113. The bottom plate 113 of the tank 101 is formed with a through hole 115 that penetrates the bottom plate 113. The inside of the aerosol flow path tube 114 and the through hole 115 are communicated with each other. The aerosol flow path tube 114 and the through hole 115 serve as a flow path for the atomized aerosol (arrow in FIG. 9).

In the state where the cartridge 11 is housed in the transmission cylinder 61, the axis Q coincides with the axis O of the main body unit 10. The axis Q is an axis common to each part constituting the cartridge 11. In the following, the axis Q is not limited to the axis Q of the tank 101, and will be used in the description of each part constituting the cartridge 11.

FIG. 12 is a perspective view of the gasket 102.
As shown in FIG. 12, the gasket 102 has a substantially cylindrical shape formed so that the outer diameter is substantially the same as the inner diameter of the tank 101. The gasket 102 is housed in the tank 101. A concave groove 121 through which the aerosol flow path tube 114 can be inserted is formed on the peripheral edge of the main body 120 of the gasket 102. The concave groove 121 is formed over the entire length in the Q direction of the axis, and is formed in a substantially arc shape along the outer shape of the aerosol flow path tube 114. On the outer peripheral edge of one surface 120a on the mouthpiece 23 side of the main body 120, a flange portion 122 rising from the one surface 120a to the mouthpiece 23 side is formed. When the gasket 102 is housed in the tank 101, the concave groove 121 may be aligned with the position of the aerosol flow path tube 114 and inserted in the axis Q direction. The gasket 102 is inserted until the flange portion 122 of the gasket 102 abuts on the rib 112 of the tank 101. The gasket 102 is held at a position where it abuts against the rib 112. With the gasket 102 positioned, the outer peripheral surface of the gasket 102 is in contact with the inner peripheral wall 111 of the tank 101. Further, the concave groove 121 of the gasket 102 is in contact with the outer peripheral surface of the aerosol flow path tube 114.

The mesh body 103 is held on the other surface 120b on the power supply unit 21 side of the main body 120. A recess 123 capable of accommodating the mesh body 103 is formed substantially in the center of the other surface 120b. By accommodating the mesh body 103 in the recess 123, the mesh body 103 is positioned and the posture of the mesh body 103 is maintained. That is, the mesh body 103 is configured to be fitted into the recess 123. A through hole 124 through which an aerosol source can flow is formed in the radial center of the gasket 102 on the bottom surface 123a of the recess 123. Two through holes 124 are formed in parallel in a rectangular shape when viewed from the axis Q direction.

As shown in FIG. 10, the mesh body 103 is a porous and liquid-absorbent member. The mesh body 103 is formed of, for example, a cotton-based fiber material. The mesh body 103 is formed in substantially the same shape as the recess 123 of the gasket 102.

The inside of the tank 101 is divided into a liquid storage chamber 130 defined on the mouthpiece 23 side of the mesh body 103 and an opening chamber 131 on the power supply unit 21 side of the mesh body 103. A liquid aerosol source is stored in the liquid storage chamber 130. The opening chamber 131 is a room for atomizing the aerosol source sucked up by the mesh body 103.

One surface 103a of the mesh body 103 on the mouthpiece 23 side is in contact with the bottom surface 123a of the gasket 102. The other surface 103b of the mesh body 103 on the power supply unit 21 side is exposed to the opening chamber 131. A heating unit 104 is provided so as to be connected to the other surface 103b of the mesh body 103 exposed to the opening chamber 131.

FIG. 13 is a plan view of the heating unit 104 as viewed from the power supply unit 21 side.
As shown in FIGS. 10 and 13, the heating unit 104 is for atomizing a liquid aerosol source. The heating unit 104 is housed in the opening chamber 131. The heating unit 104 includes a porous ceramic substrate 140 having a substantially rectangular parallelepiped shape. The porous ceramic substrate 140 is configured as the main body of the heating unit 104. The shape and thickness of the porous ceramic substrate 140 can be changed as appropriate.

One surface 140a on the mouthpiece 23 side of the porous ceramic substrate 140 is in contact with the other surface 103b of the mesh body 103. As a result, the aerosol source absorbed by the mesh body 103 is sucked up into the porous ceramic substrate 140.

A pair of electrode patterns 141 are provided on the heat generating surface 140b, which is the other surface of the porous ceramic substrate 140 on the power supply unit 21 side. The pair of

electrode patterns

141 and 141 have a strip-shaped shape along substantially both sides of the longitudinal heating surface 140b in the radial direction. The heat generating surface 140b is provided with a resistor pattern 142 connecting between the pair of

electrode patterns

141 and 141. The resistor pattern 142 has a meandering curved shape when viewed from the axis Q direction. Both ends of the resistor pattern 142 are connected to the pair of

electrode patterns

141 and 141, respectively, and are configured to be electrically conductive. In the resistor pattern 142, one end of a pair of U-shaped arcs is connected to each other, and the other end is connected to each of the pair of

electrode patterns

141 and 141. The resistor pattern 142 is configured to be capable of raising the temperature to a predetermined temperature by flowing electricity through the electrode pattern 141. The resistance pattern 142 is heated to an appropriate temperature at which an aerosol is generated. The shape of the resistor pattern 142 is arbitrary and does not have to be a meandering curved shape. The pair of

electrode patterns

141 and 141 and the resistor pattern 142 are arranged on the glass layer 143 formed on the heat generating surface 140b.

A liquid supply channel 145 is formed on the porous ceramic substrate 140. The liquid supply channel 145 is a flow path through which a liquid (aerosol source) flows. In the liquid supply channel 145, the liquid is configured to be able to travel in the liquid supply channel 145, for example by capillarity. The liquid supply channel 145 allows the aerosol source to flow from one surface 140a toward the heat generating surface 140b.
The method for manufacturing the heating unit 104 and the like will be described in detail below.

FIG. 14 is a perspective view of the atomizing container 105.
As shown in FIGS. 10 and 14, the atomizing container 105 is formed in a multi-stage cylindrical shape with the axis Q as the central axis. The main body 150 of the atomizing container 105 has a first cylinder portion 151 on the mouthpiece 23 side whose outer diameter is formed to be substantially the same as the inner diameter of the tank 101, and its outer diameter is substantially the same as the outer diameter of the tank 101. It has a second cylinder portion 152 on the power supply unit 21 side formed. The atomizing container 105 is arranged so as to close the opening 110 of the tank 101.

The first cylinder portion 151 is housed in the tank 101. A concave groove 153 through which the aerosol flow path tube 114 can be inserted is formed on the peripheral edge of the first cylinder portion 151. The concave groove 153 is formed over the entire length in the axis Q direction of the first tubular portion 151, and is formed in a substantially arc shape along the outer shape of the aerosol flow path tube 114.

A through hole 154 through which the heating portion 104 can be inserted is formed in the radial center of the first cylinder portion 151. The through hole 154 is formed in substantially the same shape as the outer shape of the heating portion 104. When the heating unit 104 is arranged in the through hole 154, the heat generating surface 140b of the heating unit 104 is configured to be exposed on the power supply unit 21 side (opening chamber 131).

The second cylinder portion 152 is continuously provided on the power supply unit 21 side of the tank 101. The stepped surface 152a between the first cylinder portion 151 and the second cylinder portion 152 abuts on the end surface of the tank 101 on the power supply unit 21 side, so that the tank 101 and the atomizing container 105 are positioned.

A through hole 157 penetrating in the axis Q direction is formed in the radial center of the second cylinder portion 152. The through hole 157 communicates with the through hole 154 of the first tubular portion 151. The through hole 157 communicates with the concave groove 153. The through hole 157 communicates with the aerosol flow path tube 114. The through hole 157 of the second cylinder portion 152 is formed in a size capable of inserting the power supply bypass portion 161 provided in the heater holder 106.

The space S defined by the through hole 154 of the first cylinder portion 151 and the through hole 157 of the second cylinder portion 152 is configured as the aerosol generation portion. The aerosol generated in the space S passes through the aerosol flow path tube 114 and is guided to the mouthpiece 23 side (arrow in FIG. 9).

FIG. 15 is a perspective view of the heater holder 106.
As shown in FIGS. 10 and 15, the heater holder 106 includes a main body portion 160 formed in a disk shape with an axis Q as a central axis, and a power supply bypass portion 161 provided in the main body portion 160.

The main body 160 is formed in a disk shape and is configured to be in contact with the end face of the second cylinder 152 of the atomizing container 105 on the power supply unit 21 side. The main body 160 is formed with a through hole 162 penetrating in the Q direction of the axis. The through hole 162 communicates with the through hole 157 of the atomizing container 105. Air is taken into the cartridge 11 through the through hole 162. More specifically, when the user inhales from the mouthpiece 23, the inside of the aspirator 1 becomes a negative pressure. Then, air is taken into the suction device 1 from the ventilation port 66 of the holding unit 22. The air taken in from the vent 66 passes through the notch 46a from the outside of the surrounding convex portion 46 and is guided to the inside of the surrounding convex portion 46. After that, air flows through the through hole 162 of the main body 160 and flows into the cartridge 11, and flows through the aerosol flow path tube 114 together with the aerosol generated in the vicinity of the heating portion 104.

The power supply bypass unit 161 has a pair of

electrode plates

165 and 165. The electrode plate 165 is formed by bending a metal plate material. The electrode plate 165 is extended with a pin electrode connection portion 166 exposed on the surface 160a on the power supply unit 21 side of the main body portion 160, and an extension portion 167 continuously provided on the pin electrode connection portion 166 and extending in the axis Q direction. A heating portion connecting portion 168 that is folded back at the end portion of the portion 167 on the side of the mouthpiece 23 and extends in the radial direction is provided. A spacer 169 is arranged between the pair of

electrode plates

165 and 165.

When the cartridge 11 is attached to the main body unit 10, the pin electrode connection portion 166 comes into contact with the pin electrode 33 of the power supply unit 21 and is electrically connected. Further, when the heater holder 106 is attached to the tank 101, the heating unit connecting portion 168 comes into contact with the electrode pattern 141 of the heating unit 104 and is electrically connected.

As shown in FIGS. 2 and 10, three engaging recesses 180 facing the power supply unit 21 are formed on the peripheral walls of the atomizing container 105 and the heater holder 106. The three engaging recesses 180 are arranged at equal intervals in the circumferential direction (120 ° intervals in the circumferential direction). The engaging recess 180 is formed so that the outer side in the radial direction and the end portion on the side of the power supply unit 21 are opened. At the end of the engagement recess 180 on the power supply unit 21 side, a tapered flattening portion is formed in which the width of the engagement recess 180 in the circumferential direction gradually increases toward the end. The vertical engaging convex portions 51a to 51c of the first connecting member 41 are inserted into the three engaging recesses 180 thus formed, respectively. As a result, the cartridge 11 and the first connecting member 41 are connected, and the cartridge 11 and the first connecting member 41 are positioned in the circumferential direction.

The end cap 107 is a substantially annular plate-shaped member attached to the end portion of the tank 101 on the suction port side. A through hole 171 is formed in the radial center of the end cap 107.

The air flow (aerosol flow) in the cartridge 11 will be described with reference to FIG. 9. When air is taken in from the through hole 162 of the heater holder 106, it is guided into the opening chamber 131 (space S). The aerosol source (liquid) guided to the vicinity of the heat generating surface 140b of the heating unit 104 changes to an aerosol (gas) as the resistance pattern 142 heats up. The aerosol generated in the vicinity of the heat generating surface 140b is guided to the aerosol flow path pipe 114 of the tank 101 from the through hole 157 of the atomizing container 105 together with the air taken into the opening chamber 131 (space S). The aerosol passes from the aerosol flow path tube 114 through the through hole 115 of the bottom plate 113, and flows from the through hole 171 of the end cap 107 to the mouthpiece 23. The user can suck the aerosol together with the air from the suction port 23a of the mouthpiece 23.

Here, the configuration of the heating unit 104 will be described in detail. In the following examples, the drawings are appropriately simplified or modified, and the dimensional ratios and shapes of each part are not always drawn accurately.

(Example)
FIG. 13 is a plan view showing a heating unit (porous ceramic heating element) 104. The heating unit 104 is, for example, one surface of a rectangular parallelepiped porous ceramic substrate 140 having a long side of 6.0 mm, a short side of 3.0 mm, and a thickness of 3.0 mm, and the porous ceramic substrate 140. It is provided with a glass layer 143 fixed to a heat generating surface 140b functioning as a heating surface by sintering, and a resistor pattern 142 and an electrode pattern 141 fixed to the glass layer 143 by sintering, respectively. The heat generating surface 140b of the porous ceramic substrate 140 has a rectangular shape and functions as an atomized surface of a predetermined liquid that has penetrated into the heating unit 104 by a capillary phenomenon.

The porous ceramic substrate 140 contains any one of alumina, zirconia, mulite, silica, titania, silicon nitride, silicon carbide, and carbon as a main component, and has an average diameter of, for example, 0.15 to 500 μm, preferably 1.5 to 72 μm. A porous inorganic sintered body having continuous ventilation holes having a pore diameter, for example, a porosity bending degree coefficient ratio (porosity / bending degree coefficient) of 21 or more, preferably 26 or more, and, for example, 30 to 90% by volume. , Preferably it has an average porosity of 40-71% by volume.

The glass layer 143 is made of glass containing Ba, B, Zn, and Si, for example, borosilicate glass, and is softened below the firing temperature of the porous ceramic substrate 140 and above the firing temperature of the resistor pattern 142 and the electrode pattern 141. Has a point. The glass layer 143 is a dense glass film fixed to the heat generating surface 140b of the porous ceramic substrate 140 by sintering, for example, with a thickness of 100 μm or less, preferably about 3.0 to 90 μm. The glass layer 143 is formed of the same pattern as or slightly larger than the resistor pattern 142 and the electrode pattern 141 described later, and has substantially the same area as the resistor pattern 142 and the electrode pattern 141.

The resistor pattern 142 has a thickness of 8 to 21 μm and 1 to 3 Ω by bonding metal powders such as silver, palladium, and ruthenium oxide with a thick glass having a melting point equal to or lower than the thick film firing temperature described later. It is a heating element preferably having a value of about 1.1 to 2.7 Ω, and has a thickness fixed by sintering in an S-shaped pattern on the glass layer 143 on the heat generating surface 140b of the porous ceramic substrate 140. It is a membrane resistor. The resistor pattern 142 has an S-shape in which one ends of a pair of U-shaped portions are connected to each other. The resistor pattern 142 is formed on the heat generating surface 140b of the porous ceramic substrate 140 so as to have a size of 5 to 30%, preferably 13 to 21% with respect to the entire heat generating surface 140b.

The pair of electrode patterns 141 have conductivity equivalent to that of a conductor by bonding metal powders such as aluminum, nickel, copper, silver, platinum, and gold with a thick film glass having a melting point equal to or lower than the thick film firing temperature described later. It is a thick-film conductor that is rectangular and fixed on the glass layer 143 by sintering at both ends of the heat generating surface 140b of the porous ceramic substrate 140. The pair of electrode patterns 141 are connected to the resistor pattern 142 by overlapping the tips extending in an arc shape from the other end of the pair of U-shaped portions toward the electrode pattern 141 side. The pair of electrode patterns 141 are formed on the heat generating surface 140b of the porous ceramic substrate 140 so as to have a size of 5 to 20% with respect to the entire heat generating surface 140b.

FIG. 16 shows the manufacturing process of the heating unit 104. In FIG. 16, in the kneading step P1, the material of the porous ceramic substrate 140, for example, alumina powder, inorganic binder, defoaming agent, organic binder, water, wax, etc., has a predetermined porosity of, for example, 30 to 90%. After being prepared and mixed at a predetermined mixing ratio so as to be, the mixture is kneaded using a kneader to obtain a clay-like embryo soil. The foaming agent is, for example, resin beads. Next, in the extrusion molding step P2, the embryo soil is molded into a plate-shaped green sheet having a predetermined thickness of about 4 mm using a vacuum extrusion molding machine. Further, a groove for division is formed by pressing a linear blade against this green sheet.

Next, the green sheet obtained in the extrusion molding step P2 is dried in the drying step P3 and then fired in the firing step P4 at a firing temperature of, for example, 1300 ° C to 1500 ° C. As a result, the foaming agent, organic binder, water, wax, etc. in the embryo soil disappear, and at the same time, the alumina particles are bonded by the inorganic binder to form a ceramic plate to which a plurality of porous ceramic substrates 140 are connected. can get.

Next, in the glass paste printing / firing step P5, a thick film glass paste containing, for example, borosilicate glass powder, a resin binder, an organic solvent, etc. is obtained in the firing step P4 with the pattern of the glass layer 143 shown in FIG. After being screen-printed on a plurality of places on the ceramic plate, it is fired at a temperature lower than the firing temperature of the ceramic plate, for example, 800 ° C. to 1000 ° C. As a result, the resin binder, the organic solvent, and the like in the thick-film glass paste disappear, and at the same time, the borosilicate glass melts, and the glass layer 143 is fixed to the ceramic plate by sintering.

In the subsequent electrode paste printing / firing step P6, a thick film electrode paste containing, for example, silver (Ag) powder, a small amount of borosilicate glass, a resin binder, an organic solvent, etc. is fired in the pattern of the electrode pattern 141 shown in FIG. After being screen-printed on the glass layers 143 at a plurality of locations on the ceramic plate obtained in step P4, the firing temperature is the same as or lower than the firing temperature of the glass layer 143, for example, a thickness of 700 ° C to 900 ° C. It is fired at the film firing temperature. As a result, the resin binder, the organic solvent, etc. in the electrode paste, that is, the conductor paste disappear, and at the same time, the borosilicate glass is melted, and the silver powder is bonded by the melted borosilicate glass, so that the electrode pattern 141 is formed on the ceramic plate. It is fixed on the glass layer 143 of the above by sintering.

Subsequently, in the resistance paste printing / firing step P7, a thick film resistance containing, for example, silver-palladium (Ag-Pd) powder, borosilicate glass, a resin binder, an organic solvent, etc., and having a sheet resistance of, for example, 100 to 200 mΩ / sq. The paste is screen-printed on the glass layer 143 and the electrode pattern 141 at a plurality of locations on the ceramic plate obtained in the firing step P4 in the pattern of the resistor pattern 142 shown in FIG. 13, and then the glass layer 143. It is fired at a firing temperature lower than the firing temperature of, for example, a thick film firing temperature of 700 ° C. to 900 ° C. As a result, the resin binder, the organic solvent, etc. in the thick film resistor paste disappear, and at the same time, the borosilicate glass is melted, and the silver-palladium powder is bonded by the melted borosilicate glass, whereby the resistor pattern 142 is formed. It is fixed by sintering on the glass layer 143 and the electrode pattern 141 on the ceramic plate. The resistor pattern 142 may be formed by simultaneous firing with the electrode pattern 141.

Then, in the division step P8, the ceramic plate to which the glass layer 143, the resistor pattern 142, and the electrode pattern 141 are fixed at a plurality of locations is broken along the groove for division, so that the plurality of heating portions are heated. 104 is obtained.

The following are the contents of

Comparative Example Products

1, 2, 9 and Example Products 1 to 9, which are test samples prepared by the present inventors in the same process as the process shown in FIG. 16, and the experimental results thereof. Will be described with reference to FIGS. 17 to 21.

(Comparative example product 1)
An electrode pattern having an area of 13% with respect to the heat generating surface and 10 μm via a glass layer having a thickness of 20 μm on a non-conductive alumina substrate made of an alumina compact having a pore ratio of 0% by volume. A resistor pattern having a thickness of 2Ω and a resistance value of 2Ω and an area of 15% with respect to the heat generating surface is formed in the same manner as that shown in FIG. 13, and as shown in FIG. 17, one kind of comparative example product is formed. I prepared 1.

(Comparative example products 2a and 2b)
A glass layer is placed on two types of substrates, a conductive porous ceramic substrate having an average pore diameter of 3.3 μm and a porosity of 65% by volume, and a non-conductive porous ceramic substrate. FIG. 13 shows an electrode pattern having an area of 13% with respect to the heat generating surface and a resistor pattern having a thickness of 10 μm and a resistance value of 2 Ω and an area of 15% with respect to the heat generating surface 140b. It was formed in the same manner as shown, and two types of comparative example products 2a and 2b were prepared as shown in FIG.

(Example product 1)
On a non-conductive porous ceramic substrate with a porosity of 65% by volume and an average pore diameter of 3.3μm, through a glass layer having a thickness of 20μm, 13% with respect to the heat generating surface. An electrode pattern having an area, a resistor pattern having a thickness of 10 μm and a resistance value of 2 Ω and an area of 15% with respect to the heat generating surface were formed in the same manner as shown in FIG. I prepared it.

(Example products 2a, 2b, 2c)
Glass with a thickness of 20 μm on three non-conductive porous ceramic substrates with porosities of 65% by volume, 60% by volume, and 57% by volume and an average pore diameter of 1.5 μm. FIG. 13 shows an electrode pattern having an area of 13% with respect to the heat generating surface and a resistor pattern having a thickness of 10 μm and a resistance value of 2 Ω and having an area of 15% with respect to the heat generating surface through the layer. They were formed in the same manner as shown, and three types of Example products 2a, 2b, and 2c were prepared as shown in FIG.

(Example products 3a, 1, 3b, 3c, 3d, 3e)
Six types of non-conductive porous ceramic substrates with an average pore diameter of 1.5 μm, 3.3 μm, 4.2 μm, 5.1 μm, 72 μm and 0.15 μm and a porosity of 65% by volume. Above, a resistor pattern having a thickness of 10 μm and a resistance value of 2 Ω or 1.3 Ω and an area of 15% with respect to the heat generating surface is shown in FIG. 13 via a glass layer 143 having a thickness of 20 μm. Six types of Example products 3a, 1, 3b, 3c, 3d, and 3e were prepared as shown in FIG.

(Example products 4a, 1, 4b, 4c, 4d, 4e)
Six types with thicknesses of 22 μm, 20 μm, 19 μm, 17 μm, 90 μm, and 3 μm on a non-conductive porous ceramic substrate with a porosity of 65% by volume and an average pore diameter of 3.3 μm. FIG. 13 shows an electrode pattern having an area of 13% with respect to the heat generating surface and a resistor pattern having a thickness of 10 μm and a resistance value of 2 Ω and an area of 15% with respect to the heat generating surface via the glass layer. 6 types of Example products 4a, 1, 4b, 4c, 4d, and 4e were prepared as shown in FIG.

(Example products 5a, 5b, 5c)
On a non-conductive porous ceramic substrate with a porosity of 65% by volume and an average pore diameter of 3.3μm, through a glass layer having a thickness of 20μm, 13% with respect to the heat generating surface. FIG. 13 shows an area electrode pattern and three types of resistor patterns having a thickness of 8 μm, 17 μm, and a thickness of 21 μm and a resistance value of 1.5 Ω, and having an area of 15% with respect to the heat generating surface 140b. They were formed in the same manner as those of the same ones, and three kinds of Example products 5a, 5b, and 5c were prepared as shown in FIG.

(Example products 6a, 6b, 6c)
On a non-conductive porous ceramic substrate with a porosity of 65% by volume and an average pore diameter of 3.3 μm, through a glass layer with a thickness of 20 μm, a thickness of 17 μm and 1.5 Ω, Three types of resistor patterns with resistance values of 2Ω and 2.7Ω are formed in the same manner as shown in FIG. 13, respectively, and as shown in FIG. 17, three types of Examples 6a, 6b, and 6b are formed. 6c was prepared.

(Example products 7a, 7b, 7c, 7d, 7e, 7f, 7g)
On a non-conductive porous ceramic substrate with a porosity of 65% by volume and an average pore diameter of 3.3 μm, the thickness of 20 μm and the ratio to the width of the resistor pattern are 133%, 167%, 200. A resistor pattern with a thickness of 10 μm and a resistance value of 1.3 Ω is shown in FIG. 7 kinds of Example products 7a, 7b, 7c, 7d, 7e, 7f, and 7g were prepared as shown in FIG.

(Example product 8)
An area of 13% with respect to the heat generating surface via a glass layer having a thickness of 20 μm on a conductive porous ceramic substrate having a porosity of 65% by volume and an average pore diameter of 3.3 μm. An electrode pattern and a resistor pattern having a thickness of 10 μm and a resistance value of 2 Ω and an area of 15% with respect to the heat generating surface are formed in the same manner as in FIG. 13, as shown in FIG. One type of Example product 8 was prepared in 1.

(Example products 9a, 9b, 9c, 9d, 9e, and comparative example product 9)
Porosity and average fineness of 66% by volume and 26 μm, 40% by volume and 9.8 μm, 65% by volume and 4.0 μm, 66% by volume and 4.1 μm, 71% by volume and 13 μm, 38% by volume and 1.1 μm. A thickness of 10 μm and 1.3 Ω, 1.1 Ω via a glass layer having a thickness of 20 μm and a width of 133% with respect to the electrode pattern, respectively, on a porous ceramic substrate having a pore diameter and no conductivity. , 1.4Ω, 1.4Ω, 1.3Ω, and 1.4Ω, respectively, and 6 types of resistor patterns are formed in the same manner as shown in FIG. 13, and 5 as shown in FIG. Kind of Example product 9a, 9b, 9c, 9d, 9e, and Comparative Example product 9 were prepared.

(Measurement of glass layer thickness)
The cross-sectional shape (profile) of the glass layer 143 in the width direction is measured using a laser microscope, and the average height difference between the cross-sectional shape and the surface of the porous ceramic substrate 140 at 50% of the central portion with respect to the total width dimension is determined by glass. Calculated as the thickness of the layer.

(Measurement of atomization characteristics)
Aerosol source: glycerin 45%, propylene glycol 45%
Mixture of 10% distilled water Measuring method: A cotton impregnated with an aerosol source is brought into contact with the lower surface of each test product, and in this state, a voltage is applied between a pair of electrode patterns for 3 seconds and a voltage of 27 seconds. When an electric energy of 21 joules is applied to the resistor pattern in one heating cycle with an application rest period to atomize the aerosol source from the upper surface of the heating element, and atomization is performed in five heating cycles. The amount of weight loss of cotton is measured, and the amount of weight loss per heating cycle, that is, the amount of atomization is calculated.

(Durability evaluation method)
After repeating the heating cycle performed in the measurement of the atomization characteristics 100 times, the presence or absence of peeling of the glass layer, the resistor pattern, and the electrode pattern on the porous ceramic substrate is inspected using an 80x stereomicroscope. The presence or absence of peeling was judged, and those without peeling were evaluated as ◯, and those with peeling were evaluated as ×.

(Measurement of porosity)
The porosity of the ceramic substrate was measured by the Archimedes method. Water-saturated weight W _aw, dry weight W _air, after the water weight was measured W _aq respectively, the following equation represents the porosity P (1), by substituting them to calculate the porosity P.
_{_{P = (W aw -W air)}} / (W aw -W aq) ··· (1)

(Measurement of stomatal tortuosity coefficient)
Measurement method: The pore volume V, total pore volume V _CO , pore diameter r, and bulk density ρ _Hg of each test product (porous ceramic substrate) are measured using a mercury porosimeter, and the BET specific surface area S is adsorbed. The specific surface area of the test product is calculated based on the adsorption amount of the gas molecule whose occupied area is known, and the measurement is performed using the gas adsorption method, and the bending degree coefficient τ is calculated based on them according to the following equation (2).
τ = (2.23-1.13V _CO ρ _Hg ) (0.92y) ^{1 + E} ... (2)
However, y = (4 / S) Σ (ΔVi / ri)

In FIGS. 17 and 18, the porosity of the porous ceramic substrate is within the range satisfying both the criteria required for the product, for example, the atomization amount of 3 mg or more and the absence of peeling in 100 heating cycles. 40 to 71 volume%, average pore diameter of the porous ceramic substrate is 0.15 to 72 μm, the ratio of the width of the glass layer to the width dimension of the resistor pattern is 100 to 300%, and the thickness of the glass layer is 3.0 to 90 μm. Met.

Further, from the data shown in FIG. 18, as shown in FIGS. 19 and 20, the relationship between the atomization amount and the porosity and the relationship between the atomization amount and the tortuosity coefficient are closely correlated with each other. was gotten. Further, as shown in FIG. 21, a close correlation was obtained between the amount of atomization and the porosity bending degree coefficient ratio (porosity / bending degree coefficient). When the standard of the atomization amount required for the product is 2.5 mg or more, if the porosity bending degree coefficient ratio is 19 or more, the standard of the atomization amount is satisfied. Further, when the standard of the atomization amount required for the product is 3 mg or more, if the porosity bending degree coefficient ratio is 21 or more, the standard of the atomization amount is satisfied. Further, preferably, the porosity bending degree coefficient ratio is 26 or more.

As described above, according to the heating unit 104 of this embodiment, the resistor pattern 142 is provided on the glass layer 143, and the glass layer 143 and the pair of electrode patterns 141 connected to the resistor pattern 142 are porous. A heating portion 104 provided on the heat generating surface 140b of the quality ceramic substrate 140, in which the resistor pattern 142 generates heat when a current is supplied between the pair of electrode patterns 141, and the pore ratio bending of the porous ceramic substrate 140. The degree coefficient ratio is 21 or more, and the glass layer 143 is provided on at least the surface below the resistor pattern 142 among the heat generating surfaces of the porous ceramic substrate 140, and has penetrated into the porous ceramic substrate 140. The aerosol source is atomized by heating the resistor pattern 142 from the surface of the heat generating surface 140b of the porous ceramic substrate 140 that is not covered by the glass layer 143. Therefore, since the porous ceramic substrate 140 does not require conductivity, there are no restrictions on the material, and the material selectivity of the substrate is high. Further, by selecting a porous ceramic substrate material according to the application, it is possible to achieve both chemical resistance to an aerosol source and mechanical strength. Further, the resistance pattern 142 is formed on the heat generation surface 140b, which is one surface of the porous ceramic substrate 140, via the glass layer 143 formed in a part of the heat generation surface 140b including at least the resistance pattern 142. Since it is provided, the thermal shock resistance and adhesive strength of the resistor pattern 142 that functions as an electric resistance heating element can be obtained, and high atomization efficiency and durability can be obtained.

According to the heating unit 104 of this embodiment, the porosity bending degree coefficient ratio of the porous ceramic substrate 140 is 26 or more. As a result, the porous ceramic substrate 140 is provided with pores having a high porosity and small bending, so that high atomization performance can be obtained. If the porosity flexion coefficient ratio is less than 26, the porosity may be too low or the pores may be bent too much and the aerosol source may not be sufficiently infiltrated, resulting in insufficient atomization performance. be.

Further, according to the heating unit 104 of this embodiment, the porous ceramic substrate 140 has an average porosity of 40% by volume or more and 71% by volume or less. This facilitates the penetration of the aerosol source into the porous ceramic substrate 140, thereby increasing the atomization efficiency, that is, the atomization performance of the aerosol source. If the porosity of the porous ceramic substrate 140 exceeds 70% by volume, the durability of the heating portion 104 may not be sufficiently obtained due to the peeling of the glass layer 143, the resistor pattern 142, or the electrode pattern 141. If the porosity is less than 41.5% by volume, sufficient atomization performance may not be obtained.

According to the heating unit 104 of this embodiment, the bending degree coefficient of the pores of the porous ceramic substrate 140 is 2.0 or less. As a result, since the heating portion 104 is provided with pores having a small bending, high atomization performance can be obtained. If the bending coefficient exceeds 2.0, the penetration resistance of the aerosol source increases, the penetration of the aerosol source becomes insufficient, and the atomization performance may not be sufficiently obtained.

According to the heating unit 104 of this embodiment, the porous ceramic substrate 140 has an average pore diameter of 0.15 or more and 72 μm or less. As a result, the aerosol source can be easily infiltrated into the porous ceramic substrate 140 by the capillary action, so that the atomization efficiency of the aerosol source, that is, the atomization performance is improved. If the average pore diameter is less than 0.15 nm, the penetration resistance of the aerosol source may increase and the penetration of the aerosol source may be insufficient, and if the average pore diameter exceeds 26 nm, the capillary force due to the capillary phenomenon decreases. Therefore, the penetration of the aerosol source may be insufficient, and the atomization performance may not be sufficiently obtained.

According to the heating unit 104 of this embodiment, the glass layer 143 has a thickness of 3 to 90 μm. When the thickness of the glass layer 143 is less than 3 μm, the resistance value of the resistor pattern varies and the manufacturing yield decreases, and when it exceeds 90 μm, the heat conduction from the resistor pattern 142 to the porous ceramic substrate 140 decreases. , Sufficient atomization performance may not be obtained.

According to the heating unit 104 of this embodiment, the glass layer 143 is made of a sintered body of a thick glass paste provided on the heat generating surface 140b, which is one surface of the porous ceramic substrate 140, and the resistor pattern 142 has a resistor pattern 142. The electrode pattern 141 is made of a sintered body of a thick film resistor paste provided on the glass layer 143, and the electrode pattern 141 is made of a sintered body of a thick film conductive paste provided on the glass layer 143. As a result, a glass layer 143 having a thickness of 3 or more and 90 μm or less, and a resistor pattern 142 and an electrode pattern 141 on the glass layer 143 are formed by a thick film on one surface of the porous ceramic substrate 140. Thermal impact resistance and adhesive strength can be obtained, and durability can be obtained. When the thickness of the glass layer 143 is less than 3 μm, the resistance value of the resistor pattern 142 varies and the manufacturing yield decreases, and when it exceeds 90 μm, the heat conduction from the resistor pattern 142 to the porous ceramic substrate 140 decreases. Therefore, sufficient atomization performance may not be obtained.

According to the heating unit 104 of the present embodiment, the porous ceramic substrate 140 contains any one of alumina, zirconia, mulite, silica, titania, silicon nitride, silicon carbide, and carbon as a main component, and has a resistor pattern. Reference numeral 142 is a thick film sintered body containing a metal powder of any one of silver, palladium and ruthenium oxide and glass, and the electrode pattern 141 is any of copper, nickel, aluminum, silver, platinum and gold. It is a thick film sintered body containing the metal powder and glass, and the glass layer 143 is a thick film sintered body containing any one of Ba, B, and Zn. As described above, the glass layer 143 and the resistor pattern 142 and the electrode pattern 141 on the glass layer 143 are formed of the thick film sintered body on the heat generating surface 140b which is one surface of the porous ceramic substrate 140. Therefore, thermal shock resistance and adhesive strength can be obtained, and durability can be obtained.

According to the heating unit 104 of this embodiment, the heat generating surface 140b, which is one surface of the porous ceramic substrate 140, is a surface having a longitudinal shape, and the pair of electrode patterns 141 are arranged at both ends of the surface having the longitudinal shape. In the resistor pattern 142, one end of the pair of U-shaped portions is connected to each other, and the tip extending in an arc shape from the other end to the electrode pattern 141 side is connected to each of the pair of electrode patterns 141. As described above, since the resistor pattern 142 has a shape in which one end of the pair of U-shaped portions is connected to each other and the other end is connected to each of the pair of electrode patterns 141, heat is locally concentrated. Instead, the entire resistor pattern 142 generates heat uniformly, so that the atomization efficiency of the aerosol source, that is, the atomization performance is improved.

Although the preferred embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to this, and the present invention is also carried out in still another embodiment.

For example, in the above-mentioned embodiment, the aerosol source is a mixed solution of glycerin, propylene glycol, and distilled water in a ratio of 5: 5: 1, but other liquids such as fragrances may be used. May be further added.

Further, in the above-described embodiment, the resistor pattern 142 has a resistance value of about 1Ω or more and 3Ω or less, but may be changed to another body in relation to power transmission or the like.

Further, although the resistor pattern 142 of the above-described embodiment is an S-shaped pattern, it may be a pattern having another shape such as a sinusoidal pattern or a rectangular pattern.

Further, in the above-described embodiment, the glass layer 143 is formed of the same pattern as the resistor pattern 142 and the electrode pattern 141 or a slightly larger pattern, but is not necessarily the same pattern as the resistor pattern 142 and the electrode pattern 141. It is not necessary to be, and the pattern may be larger and different from the resistor pattern 142 and the electrode pattern 141 as long as the atomizing performance for atomizing the aerosol source is satisfied and the resistor pattern 142 can be supported.

Further, although the pair of electrode patterns 141 were formed on the glass layer 143 at both ends of the heat generating surface 140b of the porous ceramic substrate 140, they do not necessarily have to be both ends. Further, the electrode pattern 141 does not necessarily have to be formed on the glass layer 143.

Further, in the above-described embodiment, on the heat generating surface 140b of the porous ceramic substrate 140, the glass layer 143, the resistor pattern 142, and the electrode pattern 141 are composed of a thick film, but the resistor pattern 142 and the electrode pattern 141 are formed. At least one of the above may be composed of a thin film using sputtering.

Other than that, although not illustrated one by one, the present invention is carried out with various modifications within a range not deviating from the gist thereof.

For example, although the case where the glass layer 143 is provided in the heating unit 104 of the present embodiment has been described, a ceramic layer may be provided instead of the glass layer 143. That is, a thin film such as a glass layer or a ceramic layer may be provided.

It is possible to provide a non-combustion type suction device that can obtain high atomization efficiency and durability performance.

1 Aspirator (non-combustion type aspirator)
21 Power supply unit (power supply unit)
22 Holding unit (accommodation unit)
23 Mouthpiece (mouthpiece)
23a Suction port 104 Heating part 140 Porous ceramic substrate 140b Heat generation surface (one surface of the porous ceramic substrate)
141 Electrode pattern 142 Resistance pattern 143 Glass layer

Claims

Power supply and
A containment unit that can accommodate aerosol sources and
A heating unit that atomizes the aerosol source,
The aerosol source includes a suction port formed with a suction port for sucking atomized aerosol.
The heating part is
Porous ceramic substrate and
A resistor pattern provided on one surface of the porous ceramic substrate and
A pair of electrode patterns connected to the resistor pattern and provided on the one surface of the porous ceramic substrate.
In the heating unit, the resistor pattern generates heat due to the supply of electric current between the pair of electrode patterns.
The porosity bending degree coefficient ratio of the porous ceramic substrate is 21 or more.
A glass layer is provided on at least a part of the one surface of the porous ceramic substrate including the resistor pattern, and the resistor pattern is provided on the glass layer.
A non-combustion type suction device, wherein the aerosol source that has penetrated into the porous ceramic substrate is heated by the resistor pattern and discharged as the aerosol.
The non-combustion type suction device according to claim 1, wherein the porous ceramic substrate has a porosity bending degree coefficient ratio of 26 or more.
The non-combustion type aspirator according to claim 1 or 2, wherein the porous ceramic substrate has an average porosity of 40 to 71% by volume.
The non-combustion type suction device according to any one of claims 1 to 3, wherein the porosity coefficient of the pores of the porous ceramic substrate is 2.0 or less.
The non-combustion type suction device according to any one of claims 1 to 4, wherein the porous ceramic substrate has an average pore diameter of 0.15 to 72 μm.
The non-combustion type suction device according to any one of claims 1 to 5, wherein the glass layer has a thickness of 3 to 90 μm.
The glass layer is composed of a sintered body of a thick-film glass paste provided on one surface of the porous ceramic substrate.
The resistor pattern is composed of a sintered body of a thick film resistor paste provided on the glass layer.
The non-combustion type suction device according to any one of claims 1 to 6, wherein the electrode pattern is composed of a sintered body of a thick film conductive paste provided on the glass layer.
The porous ceramic substrate contains any one of alumina, zirconia, mullite, silica, titania, silicon nitride, silicon carbide, and carbon as a main component.
The resistor pattern is a thick film sintered body containing a metal powder of any one of silver, palladium, and ruthenium oxide and glass.
The electrode pattern is a thick film sintered body containing a metal powder of any one of copper, nickel, aluminum, silver, platinum, and gold and glass.
The non-combustion type suction device according to claim 7, wherein the glass layer is a thick film sintered body containing any one of Ba, B, and Zn.
One surface of the porous ceramic substrate is a surface having a longitudinal shape.
The pair of electrode patterns are arranged at both ends of the surface of the longitudinal shape.
The non-one of claims 1 to 8, wherein the resistor pattern has one end of a pair of U-shaped arcs connected to each other and the other end of the pair of electrode patterns connected to each other. Combustion type aspirator.
The non-combustion type suction device according to any one of claims 1 to 9, wherein the mouthpiece is provided with a flavor source container.
The non-combustion type aspirator according to claim 10, wherein the flavor source container contains a tobacco component.